HP Visualize c200/c240 hp workstations - hp-ux 10.20 graphics administration g - Page 51

Integrated Color Graphics Device-Dependent Information, Supported Visuals, Supported Screen Options

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Integrated Color Graphics Device-Dependent Information This sections includes information on Integrated Color Graphics and Color Graphics cards. Supported Visuals For color displays: • Class PseudoColor Depth 8 supports DBE and MBX software double-buffering • Class TrueColor Depth 8 supports DBE and MBX software double-buffering For grayscale displays, only one visual is supported: • Class GrayScale Depth 8 supports DBE and MBX software double-buffering Supported Screen Options The following Screen Options are supported: • DisableColorRecovery • 3BitCenterColor • ImageTextViaBitMap Colormaps and Colormap Management Color Graphics devices have two hardware colormaps (color lookup tables), each with 256 entries. The X server controls the allocation and contents of these hardware colormaps. Default Colormap Management Scheme Many applications use the default X11 colormap. A technicolor effect in the windows using the default colormap occurs when a non-default colormap is downloaded in the hardware colormap that had previously contained the default colormap. Because so many applications use the default X11 colormap, including the window manager, and because Color Graphics devices have two hardware colormaps, the default behavior on this device is to dedicate one hardware colormap to always hold the default X11 colormap. The second hardware colormap is available to applications that use colormaps other than the default. The default behavior can cause technicolor if two or more applications are using different, non-default colormaps. For example, Application A uses the default X11 colormap, Application B uses a different colormap, and Application C uses a third colormap. If applications A, B, and C are all executed simultaneously on a Model 712, application A would look correct. Either application B or C would have Page 51 Graphics Administration Guide for HP-UX 10.20

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Integrated Color Graphics Device-Dependent Information
This sections includes information on Integrated Color Graphics and Color Graphics cards.
Supported Visuals
For color displays:
•
Class PseudoColor Depth 8 -
supports DBE and MBX software double-buffering
•
Class TrueColor Depth 8 -
supports DBE and MBX software double-buffering
For grayscale displays, only one visual is supported:
•
Class GrayScale Depth 8 -
supports DBE and MBX software double-buffering
Supported Screen Options
The following Screen Options are supported:
•
DisableColorRecovery
•
3BitCenterColor
•
ImageTextViaBitMap
Colormaps and Colormap Management
Color Graphics devices have two hardware colormaps (color lookup tables), each with 256 entries. The
X server controls the allocation and contents of these hardware colormaps.
Default Colormap Management Scheme
Many applications use the default X11 colormap. A technicolor effect in the windows using the default
colormap occurs when a non-default colormap is downloaded in the hardware colormap that had
previously contained the default colormap.
Because so many applications use the default X11 colormap, including the window manager, and
because Color Graphics devices have two hardware colormaps, the default behavior on this device is to
dedicate one hardware colormap to always hold the default X11 colormap. The second hardware
colormap is available to applications that use colormaps other than the default.
The default behavior can cause technicolor if two or more applications are using different, non-default
colormaps. For example, Application A uses the default X11 colormap, Application B uses a different
colormap, and Application C uses a third colormap. If applications A, B, and C are all executed
simultaneously on a Model 712, application A would look correct. Either application B or C would have
Graphics Administration Guide for HP-UX 10.20
Page 51